The battery life should be decent with 2,500 mAh for the Lumia 640 and 3,000 mAh for the Lumia 640 XL. Both devices will ship in Windows Phone 8.1, Microsoft has stated that all Lumia devices running on Windows Phone 8.1 is upgradeable to Windows 10 later this year.

The Lumia 640 and Lumia 640 XL will be available in single and dual SIM versions, both versions support 4G LTE.